Esab Caddy inverter 230v LHL 130

[florin_decada]

Esab Caddy inverter 230v LHL 130 stoped welding only fun runing please can any one help out. i checked the mainboard i could not find anything wrong or burn.

 

[Talk]

Esab Caddy inverter 230v LHL 130 stoped welding only fun runing please can any one help out. i checked the mainboard i could not find anything wrong or burn.

Is there a warranty on it, if so it is esab's problem to fix it.

 

[eddie49]

Hello and welcome to the Forum !

There is a Service Manual here:

ESAB CADDY 130 SERVICE MANUAL Pdf Download

View and Download ESAB Caddy 130 service manual online. Caddy 130 welding system pdf manual download. Also for: Caddy 140, Caddy 200, Lhn 130, Lhn 140, Lhn 200.

www.manualslib.com

and a useful thread including the circuit diagram here:

L

Thread 'ESAB LHL 130 Repair'

Sep 26, 2022

Hi

Looking for some advice on repairing an old ESAB LHL 130 arc welder
All 8 Mosfets (IRF450) are blown as well as the 10 ohm gate resistors & P6KE18CA protection diodes.
I've checked the gate control pulses with a CRO & both look good.
All 3 stud mount output diodes test ok & I measure 325V DC across the main capacitor

Can anyone shed some light on the circuit?
I don't quite follow the inverter drive circuit for the main output transformer - do all 8 Mosfets turn on at the same time?
Transformer has no centre tap & there's only 1 - 1000uf capacitor
Is the output only half wave...

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